Fbank willhelm



(No Model.)

P. WILLHELM.

TAKE-UP FOR SEWING MAUHINES.

N0. 268,161. Patented Nov. 28, 1882.

WITNESSES: S INVENTOR C/fiwz/ 7%M B250? ATTORNEY UNITED STATES PATENT OFFrcF.

FRANK WILLHELM, F DAYTON, OHIO, ASSIGNOR oF ONE-HALF TO LEVI SPIELMAN, OF SAME PLACE.

TAKE-UP FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 268,161, dated November 28, 1882.

Application filed May 29. 1882.

T 0 all whom it may concern Be it known that I, FRANK WXLLHELM, a citizen of the United States, residing at Dayton. in the county of Montgomery and State of Ohio, have invented a new and useful Improvement in Sewing-Machines, of which the tbllowing is a specification.

My invention relates to the thread take-up; and it consists of a cam pivoted to the outside to of the arm, and is linked to the needle-bar, and operates a pivotal arm arranged above the cam, which carries up the thread to finish the stitch. The objects are twofold: to obtain the requisite movement of the thread without sub- 1 jecting it to unnecessary strain and close the stitch at the proper moment, and to thread the machine withoutit being necessary to pass the same through an eye. I attain these objects by the mechanism illustrated in the adcompanying drawings, in which- Figure 1 is a front view of the faceplate. Fig. II is a side view of face-plate and arm.

Similar letters refer to similar parts th roughout the several views.

2 A represents a part of the arm, and B the face plate, of the White sewing-machine. The cam E is pivoted to the side of the arm, and is attached to the needle-bar U by the link 0. Instead of this 1ink-connection, a pin may be 0 put into the needle-bar and a horizontal slot made in the end of the cam for the reception of the pin. The needle-bar must give the requisite movement to the cam, and any suitable form of connection may be used. In the cam 5 there is an irregular slot, which, carrying a pin of the take-up arm, gives the requisite movement to the thread. This slot has the form adapted to the White machine, the several dotted lines indicating the center of the several curves orarcs forming the said slot. The takeup arm F is of the form shown, and is pivoted (No model.)

to the arm above and to the right of the campivot, and the forward end is supported in a slot in the faceplate, as shown at Fig. 1. The outer end is provided with an orifice, and has afiue slot communicating therewith for the purpose of threading the same.

By using a wire spring, as indicated by dotted lines at G, the slot of the cam may be dis pensed with, as thereby the take-up arm would 5 be held to the surface of the cam,andthe same movement would result.

This take-up device can be readily adapted to any sewing-machine making the lock-stitch, it only being necessary to adapt the slot of the cam to the needle-throw and the size and movement of the shuttle. The cam is of such form that the take-up arm commences takingup the thread when the heel of the shuttle has passed the loop, and the upward movement ceases at the same instant the forward movement of the shuttle ceases, while the upward movement of the needle-bar is incomplete. The downward movement of the needle-bar supplies the loopthread for the shuttle. From thespool the thread passes an open eye on the top of the face-plate to the tension-plates, near the bottom of the same, thence to the take-up arm, loop-guide, and needle.

That I claim, and desire to secure by Let- 7o tors Patent, is-- V The combination of the cam E, as shown and described, the rear end pivoted to the sewingmachine arm and connected by the link 0 to the needle-bar, the take-up F, operated by a pin moving in said cam and pivoted above and to the rear of said cam-pivot, substantially as set forth. 4

FRANK WILLHELM.

Witnesses:

B. PICKERING, SUMNER T. SMITH. 

